From: Peter Zijlstra <peterz@infradead.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Frederic Weisbecker <fweisbec@gmail.com>,
Darren Hart <dvhart@linux.intel.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
"jason.wessel" <jason.wessel@windriver.com>,
"Ted Ts'o" <tytso@mit.edu>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Subject: Re: [RFC][PATCH 0/2] tracing: Have trace_printk()s in the events/ directory
Date: Thu, 18 Nov 2010 11:41:06 +0100 [thread overview]
Message-ID: <1290076866.2109.1305.camel@laptop> (raw)
In-Reply-To: <20101118035803.453609353@goodmis.org>
On Wed, 2010-11-17 at 22:58 -0500, Steven Rostedt wrote:
> For example, I added a trace_printk() in kernel/sched.c at line 2180
> and it creates:
>
> # ls /debug/tracing/events/printk/kernel/sched.c/2180/
> enable format
>
> The format is the printk format:
>
> # cat /debug/tracing/events/printk/kernel/sched.c/2180/format
> "migrate task %s:%d"
*groan*, so you're creating a tracepoint per instance?
That's going to be massive pain for perf.. I really don't see the point
in splitting all that out.
next prev parent reply other threads:[~2010-11-18 10:41 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-18 3:58 [RFC][PATCH 0/2] tracing: Have trace_printk()s in the events/ directory Steven Rostedt
2010-11-18 3:58 ` [RFC][PATCH 1/2] [PATCH 1/2] tracing: Rename trace_printk to ftrace_printk Steven Rostedt
2010-11-18 3:58 ` [RFC][PATCH 2/2] [PATCH 2/2] tracing: Make event based trace_printk() Steven Rostedt
2010-11-18 4:19 ` Steven Rostedt
2010-11-18 5:50 ` Lai Jiangshan
2010-11-18 12:22 ` Steven Rostedt
2010-11-18 11:58 ` Mathieu Desnoyers
2010-11-18 12:14 ` Steven Rostedt
2010-11-18 10:41 ` Peter Zijlstra [this message]
2010-11-18 11:53 ` [RFC][PATCH 0/2] tracing: Have trace_printk()s in the events/ directory Steven Rostedt
2010-11-18 12:06 ` Mathieu Desnoyers
2010-11-18 12:14 ` Steven Rostedt
2010-11-18 13:03 ` Mathieu Desnoyers
2010-11-18 12:53 ` Frederic Weisbecker
2010-11-18 13:06 ` Steven Rostedt
2010-11-18 14:02 ` Frederic Weisbecker
2010-11-18 13:21 ` Peter Zijlstra
2010-11-18 13:36 ` Frederic Weisbecker
2010-11-18 12:39 ` Frederic Weisbecker
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